How do the sliding screens function as a symbol throughout the opera?

Compare and contrast Butterfly’s and Pinkerton’s conceptions of love and marriage. How do they view their own power in relation to the power of love?

While Pinkerton is unfaithful in love, Butterfly rejects her faith in her family’s religion. How is infidelity in faith presented differently and/or similarly to infidelity in love? How does fidelity to love cause infidelity in faith?